$ git clone -n https://github.com/xcp-ng-rpms/xha.git /var/lib/mock/v8.3-u-prebuild-9283-28059/root/chroot_tmpdir/scmroot/xha
Cloning into '/var/lib/mock/v8.3-u-prebuild-9283-28059/root/chroot_tmpdir/scmroot/xha'...
$ git fetch origin 908421d38b887303202072150de5b5591334f0f6:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xha
 * [new ref]         908421d38b887303202072150de5b5591334f0f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 908421d bump release for test build